Most of us have heard of tapeworms, the parasitic creatures that find their way into the human digestive system, and can grow very long indeed. They can cause quite a bit of trouble, but I had no idea how extreme the trouble can sometimes be.
We’re all familiar with the Google home screen, yes? That minimalistic, simple page with essentially nothing but the search box and the search button—seems like great design, doesn’t it? It seems like a well-thought-out decision on what should and should not be on the home page.
Well, guess again:
“We didn’t have a webmaster and I don’t do HTML.”
That’s what Sergey Brin, Google cofounder, is said to have explained.
“He put together the simplest web page he could to test out the search engine back when he was Ph.D. student,” Mayer told a Q&A audience at the 92nd Street Y in Manhattan. “The first version didn’t even have search button because the return button worked just fine. We just kind of stumbled into it.”
That iconic page design—and all because Sergey Brin didn’t care about HTML. (The article has some more tidbits; go read.)
This is an amazing discovery. It’s been known, of course, that some birds (and other animals) are capable of detecting the earth’s magnetic field. This is what gives them a sense of direction, and they seem to know exactly where they are going. Until now, exactly how this detection happened was not completely known, although it was guessed that vision was involved.
This ‘compass’ sense must be associated with the eyeball, because the birds cannot detect magnetic fields in darkness.
But now Oxford University and National University of Singapore scientists have shown that birds may really ‘see’ the invisible force of magnetism, giving them a compass on top of their normal vision: rather like aircraft ‘head up displays’ which overlay crucial navigation information on a transparent screen in front of the pilot.
The ‘technology’, so to speak, involves a special molecule in the eye. When a photon of light enters the eye and hits the molecule, it causes an electromagnetic effect in the eye—and since this effect also depends on the surrounding magnetic field, the effect translates into a ‘map’ of the earth’s magnetic field. All this, right in the eye of the bird!
The next question, I guess, ought to be: is the absence of light the only reason that the birds can’t navigate at night? Would they do fine if there was artificial ambient light at night? What happens if they are fitted out with a ‘headlamp’ of sorts, that reflects light back into their retinas? Is there a minimum amount of light that would be the threshold? This is all very exciting.
In related news, a protein in the human retina has previously been found to possess magnetic properties. This is possibly remnants of the same system—which poses the question: did humans ever have the capacity to detect magnetic fields? Is this a rudimentary evolutionary leftover, or did we shed our sensing capabilities as we gave up our migratory habits and settled down to a life of agriculture?
Really—the more we find out about nature, the more amazing it all is. (Well, granted—the Earth has had a few million years to test and improve new technology, but you’ve got to admit, this is pretty cool.)
Remember the Russian spacecraft—headed for Mars—that failed mysteriously recently not long after takeoff? There were a few suggested reasons for the failure—such as effects due to cosmic rays from the sun, and the result of exposure to US radars
Well, turns out the reasons were more prosaic than that–the craft failed due to a programming error! Two channels of the onboard computer rebooted simultaneously—which evidently they were not supposed to do.
Amazing how the most complex missions can be undone by relatively simpler errors—remember the NASA Mars mission that failed due to a mistake in the units used?
Be careful what you do with your tap water:
The Louisiana Department of Health and Hospitals has issued a weird warning: if you have to irrigate your sinuses with water for some medical reason, don’t use tap water. The reason: your brains may get eaten by the Naegleria fowleri.
Water that you drink is quite all right—even if it contains the bacteria, it will be destroyed when it reaches the stomach and the body’s digestive juices.
But beware if you intend to put water up your nose! This channel is not intended for water (or other food), and does not have the same defense systems as our digestive system does.
The amoeba attacks your nervous system, and can pretty soon leave you dead! Fortunately, the way around is pretty simple: just boil the water to kill the bug!
(My gripe with the article: no source information! No links, whatsoever. Terrible.)
After fighting cancer for a while, Christopher Hitchens is no more. I’ve only read (and heard) a tiny fraction of his writings (and talks), but was fascinated even in that small exposure to him. A fiery and uninhibited speaker and writer, what struck me most were his clarity of thought and lucidity of expression, and how his ideas seemed to flow, languidly almost, from thesis to conclusion.
Another terrible loss for humankind this year. Rest in Peace, sir.
(Cross-posted at GlobeTrekker)
This is a very interesting article about why the naked mole rat can’t feel pain from acid burns. Apparently it was already known that they don’t feel the pain; their hypothesis about why it happened—that the acid sensing ion channels that tell neurons to transmit pain would be missing—was not true.
I recently found this very interesting documentary, called ‘Forks over Knives’, that deals with the idea that much of our modern health problems can be solved by changing our diets. This in itself is, of course, not a revolutionary idea—most of us are quite aware of what we need to do to stay healthy. (That we don’t actually do it is another matter entirely!)
What piqued my interest (and great dismay) was some of the views in the documentary—were some of the ideas that I currently have so wrong? And the theses were from respected doctors, who seemed to have done quite a bit of research, and extensive research at that, in coming up with their ideas!
Being conscious of our hygiene is a good thing, of course. But is it possible to overdo our hygiene routines for our own good? Have you noticed how more and more people use sanitizing hand wipes, or antibacterial hand soaps? Their function, of course, is to ‘wipe out’ all the bacteria around you—but is that always a good thing?
I’ve always had my theories, but now there’s actual evidence—it’s probably not a very good thing on the long run.
I had not heard of the Abydos carvings before. But then we went to Egypt, and it turned out that my Dad had requested that Abydos be put on the schedule—even though it wasn’t a ‘usual’ tourist destination. (I still don’t know whether he’d come across these specific carvings as a reason to go there. Baba, will you leave a comment if you read this? :))
But the carvings were quite amazing. There they were—a few of them adjacent to each other, each apparently depicting something we’d recognize as a modern (or future) means of air travel. (I have my own photos, but it’s easier to link to photos online.)